Add JMA Haneda temps and fix stale detail loading

data/probability_training_snapshots.jsonl

@@ -124,3 +124,5 @@
 {"city": "shanghai", "timestamp": "2026-03-29T15:00:00.000Z", "date": "2026-03-29", "temp_symbol": "°C", "raw_mu": null, "raw_sigma": 0.23736458333333335, "deb_prediction": 18.4, "ensemble": {"p10": 16.1, "median": 16.5, "p90": 16.9}, "multi_model": {"Open-Meteo": 17.0, "ECMWF": 19.2, "GFS": 19.1, "ICON": 17.0, "GEM": 17.6, "JMA": 15.8}, "max_so_far": 18.0, "observation": {"current_temp": 14.0, "humidity": null, "wind_speed_kt": 4.0, "visibility_mi": 3.11, "local_hour": 23.25}, "peak_status": "past", "prob_snapshot": [{"v": 18, "p": 1.0}], "shadow_prob_snapshot": [], "probability_engine": "legacy", "probability_mode": "legacy", "calibration_version": null, "calibration_source": null, "calibrated_mu": null, "calibrated_sigma": null}
 {"city": "ankara", "timestamp": "2026-03-29T15:01:00.000Z", "date": "2026-03-29", "temp_symbol": "°C", "raw_mu": null, "raw_sigma": 0.25176666666666664, "deb_prediction": 9.7, "ensemble": {"p10": 9.2, "median": 9.5, "p90": 10.2}, "multi_model": {"Open-Meteo": 9.2, "ECMWF": 9.5, "GFS": 10.1, "ICON": 9.2, "GEM": 11.0, "JMA": 10.0}, "max_so_far": 10.0, "observation": {"current_temp": 7.0, "humidity": null, "wind_speed_kt": 12.0, "visibility_mi": null, "local_hour": 18.25}, "peak_status": "past", "prob_snapshot": [{"v": 10, "p": 1.0}], "shadow_prob_snapshot": [], "probability_engine": "legacy", "probability_mode": "legacy", "calibration_version": null, "calibration_source": null, "calibrated_mu": null, "calibrated_sigma": null}
 {"city": "chengdu", "timestamp": "2026-04-08T07:00:00.000Z", "date": "2026-04-08", "temp_symbol": "°C", "raw_mu": 24.3, "raw_sigma": 1.1821289062499998, "deb_prediction": 23.1, "ensemble": {"p10": 21.8, "median": 23.0, "p90": 24.5}, "multi_model": {"Open-Meteo": 22.5, "ECMWF": 23.9, "GFS": 23.0, "ICON": 22.5, "GEM": 23.7, "JMA": 23.2}, "max_so_far": 24.0, "observation": {"current_temp": 24.0, "humidity": null, "wind_speed_kt": 4.0, "visibility_mi": null, "local_hour": 15.183333333333334}, "peak_status": "before", "prob_snapshot": [{"v": 24, "p": 0.442}, {"v": 25, "p": 0.386}, {"v": 26, "p": 0.172}], "shadow_prob_snapshot": [{"v": 24, "p": 0.394}, {"v": 25, "p": 0.355}, {"v": 26, "p": 0.19}, {"v": 27, "p": 0.06}], "probability_engine": "legacy", "probability_mode": "emos_shadow", "calibration_version": "emos-20260402162744", "calibration_source": "artifacts\\probability_calibration\\default.json", "calibrated_mu": 24.3, "calibrated_sigma": 1.354078466151897}
+{"city": "chengdu", "timestamp": "2026-04-08T08:00:00.000Z", "date": "2026-04-08", "temp_symbol": "°C", "raw_mu": 24.3, "raw_sigma": 0.7283767361111106, "deb_prediction": 23.1, "ensemble": {"p10": 21.8, "median": 22.9, "p90": 24.2}, "multi_model": {"Open-Meteo": 22.5, "ECMWF": 23.9, "GFS": 22.5, "ICON": 22.5, "GEM": 23.7, "JMA": 23.2}, "max_so_far": 24.0, "observation": {"current_temp": 23.0, "humidity": null, "wind_speed_kt": 4.0, "visibility_mi": null, "local_hour": 16.133333333333333}, "peak_status": "in_window", "prob_snapshot": [{"v": 24, "p": 0.547}, {"v": 25, "p": 0.397}, {"v": 26, "p": 0.056}], "shadow_prob_snapshot": [{"v": 24, "p": 0.521}, {"v": 25, "p": 0.399}, {"v": 26, "p": 0.08}], "probability_engine": "legacy", "probability_mode": "emos_shadow", "calibration_version": "emos-20260402162744", "calibration_source": "artifacts\\probability_calibration\\default.json", "calibrated_mu": 24.3, "calibrated_sigma": 0.8140063140878262}
+{"city": "tokyo", "timestamp": "2026-04-08T08:00:00.000Z", "date": "2026-04-08", "temp_symbol": "°C", "raw_mu": 17.810000000000002, "raw_sigma": 0.23200683593750038, "deb_prediction": 17.1, "ensemble": {"p10": 17.4, "median": 18.3, "p90": 19.1}, "multi_model": {"Open-Meteo": 16.1, "ECMWF": 16.3, "GFS": 17.6, "ICON": 18.2, "GEM": 18.3, "JMA": 16.1}, "max_so_far": 17.0, "observation": {"current_temp": 16.0, "humidity": null, "wind_speed_kt": 17.0, "visibility_mi": null, "local_hour": 17.133333333333333}, "peak_status": "past", "prob_snapshot": [{"v": 18, "p": 0.909}, {"v": 17, "p": 0.091}], "shadow_prob_snapshot": [{"v": 18, "p": 0.892}, {"v": 17, "p": 0.108}], "probability_engine": "legacy", "probability_mode": "emos_shadow", "calibration_version": "emos-20260402162744", "calibration_source": "artifacts\\probability_calibration\\default.json", "calibrated_mu": 17.810000000000002, "calibrated_sigma": 0.25}

frontend/components/dashboard/Dashboard.module.css

@@ -961,6 +961,10 @@
   gap: 8px;
 }
 
+.root :global(.forecast-inline-note) {
+  line-height: 1.45;
+}
+
 .root :global(.forecast-day) {
   background: rgba(255, 255, 255, 0.03);
   border: 1px solid var(--border-subtle);
@@ -1000,6 +1004,31 @@
   color: var(--accent-cyan);
 }
 
+@media (max-width: 720px) {
+  .root :global(.forecast-table) {
+    display: flex;
+    gap: 10px;
+    overflow-x: auto;
+    padding-bottom: 4px;
+    scroll-snap-type: x proximity;
+  }
+
+  .root :global(.forecast-table::-webkit-scrollbar) {
+    height: 6px;
+  }
+
+  .root :global(.forecast-table::-webkit-scrollbar-thumb) {
+    background: rgba(148, 163, 184, 0.32);
+    border-radius: 999px;
+  }
+
+  .root :global(.forecast-day) {
+    flex: 0 0 112px;
+    min-width: 112px;
+    scroll-snap-align: start;
+  }
+}
+
 .root :global(.sun-info) {
   margin-top: 10px;
   font-size: 12px;

frontend/components/dashboard/PanelSections.tsx

@@ -724,6 +724,7 @@ export function ForecastTable() {
   if (!data) return null;
 
   const daily = data.forecast?.daily || [];
+  const isSparseDaily = daily.length <= 1;
   const resolveForecastTemp = (date: string, fallback: number | null | undefined) => {
     const debPrediction = data.multi_model_daily?.[date]?.deb?.prediction;
     return debPrediction ?? fallback ?? null;
@@ -731,6 +732,20 @@ export function ForecastTable() {
   return (
     <section className="forecast-section">
       <h3>{t("forecast.title")}</h3>
+      {isSparseDaily && (
+        <div
+          className="forecast-inline-note"
+          style={{
+            color: "var(--text-secondary)",
+            fontSize: "12px",
+            marginBottom: "10px",
+          }}
+        >
+          {store.loadingState.cityDetail
+            ? "多日预报同步中，正在刷新完整日序列。"
+            : "当前只收到当日预报，其他日期结果暂未回传。"}
+        </div>
+      )}
       <div className="forecast-table">
         {daily.length === 0 ? (
           <EmptyState text={t("forecast.empty")} />

frontend/components/dashboard/PolyWeatherDashboard.tsx

@@ -77,7 +77,8 @@ function DashboardScreen() {
   // Avoid full-page flashing on initial load; only show this overlay for manual refresh.
   const showLoading =
     store.loadingState.cities ||
-    store.loadingState.refresh;
+    store.loadingState.refresh ||
+    store.loadingState.cityDetail;
 
   return (
     <div className={styles.root}>

frontend/hooks/useDashboardStore.tsx

@@ -106,6 +106,11 @@ function countAvailableModels(
   ).length;
 }
 
+function countForecastDays(detail?: CityDetail | null): number {
+  const daily = detail?.forecast?.daily;
+  return Array.isArray(daily) ? daily.length : 0;
+}
+
 function hasSparseModelCoverage(
   detail?: CityDetail | null,
   targetDate?: string | null,
@@ -113,6 +118,16 @@ function hasSparseModelCoverage(
   return countAvailableModels(detail, targetDate) <= 1;
 }
 
+function hasSparseDetailCoverage(
+  detail?: CityDetail | null,
+  targetDate?: string | null,
+): boolean {
+  if (!detail) return true;
+  return (
+    hasSparseModelCoverage(detail, targetDate) || countForecastDays(detail) <= 1
+  );
+}
+
 export function DashboardStoreProvider({
   children,
 }: {
@@ -244,7 +259,13 @@ export function DashboardStoreProvider({
   const ensureCityDetail = async (cityName: string, force = false) => {
     const cached = cityDetailsByName[cityName];
     const cachedMeta = cityDetailMetaByName[cityName];
-    if (!force && cached && dashboardClient.isCityDetailFresh(cachedMeta)) {
+    const cachedIsSparse = hasSparseDetailCoverage(cached, cached?.local_date);
+    if (
+      !force &&
+      cached &&
+      !cachedIsSparse &&
+      dashboardClient.isCityDetailFresh(cachedMeta)
+    ) {
       scheduleBackgroundDetailRefresh(cityName, cached, cachedMeta);
       return cached;
     }
@@ -254,6 +275,28 @@ export function DashboardStoreProvider({
         const summary = await dashboardClient.getCitySummary(cityName);
         const revision = getCityRevision(summary);
         if (revision && revision === cachedMeta?.revision) {
+          if (cachedIsSparse) {
+            const latestDetail = await dashboardClient.getCityDetail(cityName, {
+              force: true,
+            });
+            const detail = latestDetail;
+            setCityDetailsByName((current) => ({
+              ...current,
+              [cityName]: detail,
+            }));
+            setCitySummariesByName((current) => ({
+              ...current,
+              [cityName]: toCitySummary(detail),
+            }));
+            setCityDetailMetaByName((current) => ({
+              ...current,
+              [cityName]: {
+                cachedAt: Date.now(),
+                revision: getCityRevision(detail),
+              },
+            }));
+            return detail;
+          }
           setCityDetailMetaByName((current) => ({
             ...current,
             [cityName]: {
@@ -472,9 +515,14 @@ export function DashboardStoreProvider({
       await refreshProAccess();
     }
     const access = proAccessRef.current;
+    const cachedDetail = cityDetailsByName[cityName];
+    const needsDetailRefresh = hasSparseDetailCoverage(
+      cachedDetail,
+      cachedDetail?.local_date,
+    );
     setLoadingState((current) => ({ ...current, cityDetail: true }));
     try {
-      const detail = await ensureCityDetail(cityName);
+      const detail = await ensureCityDetail(cityName, needsDetailRefresh);
       setSelectedForecastDate(detail.local_date);
       if (access.authenticated && access.subscriptionActive) {
         // 预热市场数据，不做 await 阻塞，后台静默拉取
@@ -621,9 +669,9 @@ export function DashboardStoreProvider({
         setFutureModalDate(dateStr);
         if (!selectedCity || !proAccess.subscriptionActive) return;
         const cachedDetail = cityDetailsByName[selectedCity];
-        const needsModelRefresh =
+        const needsDetailRefresh =
-          !forceRefresh && hasSparseModelCoverage(cachedDetail, dateStr);
+          !forceRefresh && hasSparseDetailCoverage(cachedDetail, dateStr);
-        if (needsModelRefresh) {
+        if (needsDetailRefresh) {
           void ensureCityDetail(selectedCity, true).catch(() => {});
         }
         const cacheKey = getMarketScanCacheKey(selectedCity, dateStr);
@@ -652,8 +700,9 @@ export function DashboardStoreProvider({
           setFutureModalDate(cachedDetail.local_date);
         }
         if (!proAccess.subscriptionActive) return;
-        const needsModelRefresh =
+        const needsDetailRefresh =
-          !forceRefresh && hasSparseModelCoverage(cachedDetail, cachedDetail?.local_date);
+          !forceRefresh &&
+          hasSparseDetailCoverage(cachedDetail, cachedDetail?.local_date);
 
         setLoadingState((current) => ({
           ...current,
@@ -664,7 +713,7 @@ export function DashboardStoreProvider({
         try {
           const detail = await ensureCityDetail(
             selectedCity,
-            Boolean(forceRefresh || needsModelRefresh),
+            Boolean(forceRefresh || needsDetailRefresh),
           );
           setSelectedForecastDate(detail.local_date);
           setFutureModalDate(detail.local_date);

frontend/hooks/useLeafletMap.ts

@@ -342,9 +342,18 @@ export function useLeafletMap({
               }).addTo(map);
 
               marker.on("click", () => {
-                map.stop();
+                const currentMap = mapRef.current;
-                // Reset lastMovedCity so we can re-fly if needed
+                currentMap?.stop();
-                lastMovedCityRef.current = null;
+                if (currentMap && !suspendMotion) {
+                  currentMap.flyTo([city.lat, city.lon], 11, {
+                    animate: true,
+                    duration: 1.05,
+                    easeLinearity: 0.22,
+                  });
+                  lastMovedCityRef.current = city.name;
+                } else {
+                  lastMovedCityRef.current = null;
+                }
                 onSelectCityRef.current(city.name);
               });
 

frontend/lib/dashboard-client.ts

@@ -57,6 +57,12 @@ export function getCityRevision(source?: CityDetail | CitySummary | null) {
       ? source.multi_model_daily?.[source.local_date || ""]
       : null;
   const modelFootprint = modelDaily?.models || ("multi_model" in source ? source.multi_model : null);
+  const forecastFootprint =
+    "forecast" in source && Array.isArray(source.forecast?.daily)
+      ? source.forecast.daily
+          .map((item) => `${normalizeRevisionPart(item?.date)}:${normalizeRevisionPart(item?.max_temp)}`)
+          .join("|")
+      : "";
   return [
     normalizeRevisionPart(source.updated_at),
     normalizeRevisionPart(source.current?.obs_time),
@@ -70,6 +76,7 @@ export function getCityRevision(source?: CityDetail | CitySummary | null) {
             .join("|")
         : "",
     ),
+    normalizeRevisionPart(forecastFootprint),
   ].join("|");
 }
 

src/data_collection/country_networks.py

@@ -16,6 +16,10 @@ CHINA_CMA_CITIES = {
 }
 
 
+def _japan_jma_cities() -> set[str]:
+    return {"tokyo"}
+
+
 def _safe_float(value: Any) -> Optional[float]:
     try:
         if value is None or value == "":
@@ -39,6 +43,8 @@ def _provider_code_for_city(city: str) -> str:
         return "hongkong_hko"
     if settlement_source == "cwa":
         return "taiwan_cwa"
+    if normalized in _japan_jma_cities():
+        return "japan_jma"
     if normalized in CHINA_CMA_CITIES:
         return "china_cma"
     return "global_metar"
@@ -175,6 +181,30 @@ def _nmc_rows(raw: Dict[str, Any], city: str) -> List[Dict[str, Any]]:
     return out
 
 
+def _jma_rows(raw: Dict[str, Any], city: str) -> List[Dict[str, Any]]:
+    rows = raw.get("jma_official_nearby") or []
+    out: List[Dict[str, Any]] = []
+    for row in rows:
+        if not isinstance(row, dict):
+            continue
+        out.append(
+            _normalize_station_row(
+                station_code=row.get("icao") or row.get("istNo"),
+                station_label=row.get("name"),
+                temp=row.get("temp"),
+                lat=row.get("lat"),
+                lon=row.get("lon"),
+                obs_time=row.get("obs_time"),
+                source_code="jma",
+                source_label="JMA",
+                is_official=True,
+                is_airport_station=False,
+                is_settlement_anchor=False,
+            )
+        )
+    return out
+
+
 def _mgm_rows(raw: Dict[str, Any], city: str) -> List[Dict[str, Any]]:
     meta = _city_meta(city)
     rows = raw.get("mgm_nearby") or []
@@ -393,6 +423,28 @@ class ChinaCmaNetworkProvider(CountryNetworkProvider):
         }
 
 
+class JapanJmaNetworkProvider(CountryNetworkProvider):
+    def __init__(self) -> None:
+        super().__init__("japan_jma", "JMA")
+
+    def official_nearby_current(self, city: str, raw: Dict[str, Any]) -> List[Dict[str, Any]]:
+        rows = _jma_rows(raw, city)
+        if rows:
+            return rows
+        return _metar_cluster_rows(raw)
+
+    def official_network_status(self, city: str, raw: Dict[str, Any]) -> Dict[str, Any]:
+        rows = self.official_nearby_current(city, raw)
+        has_jma = bool(_jma_rows(raw, city))
+        return {
+            "provider_code": self.provider_code,
+            "provider_label": self.provider_label,
+            "available": has_jma,
+            "mode": "official_active" if has_jma else ("fallback_metar_cluster" if rows else "reference_only"),
+            "row_count": len(rows),
+        }
+
+
 class HongKongHkoNetworkProvider(CountryNetworkProvider):
     def __init__(self) -> None:
         super().__init__("hongkong_hko", "HKO")
@@ -415,6 +467,8 @@ def get_country_network_provider(city: str) -> CountryNetworkProvider:
     provider_code = _provider_code_for_city(city)
     if provider_code == "turkey_mgm":
         return TurkeyMgmNetworkProvider()
+    if provider_code == "japan_jma":
+        return JapanJmaNetworkProvider()
     if provider_code == "china_cma":
         return ChinaCmaNetworkProvider()
     if provider_code == "hongkong_hko":

src/data_collection/jma_amedas_sources.py

@@ -0,0 +1,145 @@
+from __future__ import annotations
+
+import threading
+import time
+from datetime import datetime
+from typing import Any, Dict, List, Optional
+
+from loguru import logger
+
+from src.utils.metrics import record_source_call
+
+
+JMA_AMEDAS_STATIONS: Dict[str, Dict[str, Any]] = {
+    "tokyo": {
+        "station_code": "44166",
+        "station_label": "羽田 10分实况 (JMA)",
+        "lat": 35.5533,
+        "lon": 139.78,
+    },
+}
+
+
+class JmaAmedasSourceMixin:
+    def _jma_http_get_text(self, url: str) -> str:
+        getter = getattr(self, "_http_get", None)
+        if callable(getter):
+            response = getter(url)
+        else:
+            response = self.session.get(url, timeout=self.timeout)
+        response.raise_for_status()
+        return response.text
+
+    @staticmethod
+    def _jma_safe_float(value: Any) -> Optional[float]:
+        try:
+            if value in (None, "", "///"):
+                return None
+            return float(value)
+        except Exception:
+            return None
+
+    def fetch_jma_amedas_current(
+        self,
+        city: str,
+        use_fahrenheit: bool = False,
+    ) -> Optional[Dict[str, Any]]:
+        started = time.perf_counter()
+        city_key = str(city or "").strip().lower()
+        meta = JMA_AMEDAS_STATIONS.get(city_key) or {}
+        if not meta:
+            record_source_call("jma_amedas", "current", "unsupported_city", (time.perf_counter() - started) * 1000.0)
+            return None
+
+        cache_key = f"{city_key}:{use_fahrenheit}"
+        now_ts = time.time()
+        with self._jma_cache_lock:
+            cached = self._jma_cache.get(cache_key)
+            if cached and now_ts - cached["t"] < self.jma_cache_ttl_sec:
+                record_source_call("jma_amedas", "current", "cache_hit", (time.perf_counter() - started) * 1000.0)
+                return cached["d"]
+
+        try:
+            latest_time_text = self._jma_http_get_text(
+                "https://www.jma.go.jp/bosai/amedas/data/latest_time.txt"
+            ).strip()
+            latest_dt = datetime.fromisoformat(latest_time_text)
+            bucket_hour = (latest_dt.hour // 3) * 3
+            bucket_key = f"{latest_dt.strftime('%Y%m%d')}_{bucket_hour:02d}"
+            station_code = str(meta.get("station_code") or "").strip()
+            url = f"https://www.jma.go.jp/bosai/amedas/data/point/{station_code}/{bucket_key}.json"
+
+            getter = getattr(self, "_http_get_json", None)
+            if callable(getter):
+                payload = getter(url)
+            else:
+                response = self.session.get(url, timeout=self.timeout)
+                response.raise_for_status()
+                payload = response.json()
+
+            if not isinstance(payload, dict) or not payload:
+                record_source_call("jma_amedas", "current", "empty", (time.perf_counter() - started) * 1000.0)
+                return None
+
+            latest_key = sorted(payload.keys())[-1]
+            row = payload.get(latest_key) or {}
+            temp_pair = row.get("temp") or []
+            temp_c = self._jma_safe_float(temp_pair[0] if isinstance(temp_pair, list) and temp_pair else None)
+            if temp_c is None:
+                record_source_call("jma_amedas", "current", "no_temperature", (time.perf_counter() - started) * 1000.0)
+                return None
+
+            temp = round(temp_c * 9 / 5 + 32, 1) if use_fahrenheit else round(temp_c, 1)
+            obs_time = None
+            try:
+                obs_time = datetime.strptime(str(latest_key), "%Y%m%d%H%M%S").isoformat()
+            except Exception:
+                obs_time = str(latest_key)
+
+            result = {
+                "source": "jma_amedas",
+                "timestamp": datetime.utcnow().isoformat(),
+                "station_code": station_code,
+                "station_name": meta.get("station_label") or "羽田 10分实况 (JMA)",
+                "obs_time": obs_time,
+                "current": {
+                    "temp": temp,
+                },
+            }
+            with self._jma_cache_lock:
+                self._jma_cache[cache_key] = {"d": result, "t": now_ts}
+            record_source_call("jma_amedas", "current", "success", (time.perf_counter() - started) * 1000.0)
+            return result
+        except Exception as exc:
+            logger.warning("JMA AMeDAS current fetch failed city={} error={}", city_key, exc)
+            with self._jma_cache_lock:
+                stale = self._jma_cache.get(cache_key)
+                if stale:
+                    record_source_call("jma_amedas", "current", "stale_cache", (time.perf_counter() - started) * 1000.0)
+                    return stale["d"]
+            record_source_call("jma_amedas", "current", "error", (time.perf_counter() - started) * 1000.0)
+            return None
+
+    def fetch_jma_amedas_official_nearby(
+        self,
+        city: str,
+        use_fahrenheit: bool = False,
+    ) -> List[Dict[str, Any]]:
+        current = self.fetch_jma_amedas_current(city, use_fahrenheit=use_fahrenheit)
+        if not current:
+            return []
+        meta = JMA_AMEDAS_STATIONS.get(str(city or "").strip().lower()) or {}
+        return [
+            {
+                "name": meta.get("station_label") or "羽田 10分实况 (JMA)",
+                "station_label": meta.get("station_label") or "羽田 10分实况 (JMA)",
+                "lat": meta.get("lat"),
+                "lon": meta.get("lon"),
+                "temp": (current.get("current") or {}).get("temp"),
+                "icao": current.get("station_code"),
+                "istNo": current.get("station_code"),
+                "source": "jma",
+                "source_label": "JMA",
+                "obs_time": current.get("obs_time"),
+            }
+        ]

src/data_collection/weather_sources.py

@@ -10,11 +10,12 @@ from src.data_collection.open_meteo_cache import OpenMeteoCacheMixin
 from src.data_collection.settlement_sources import SettlementSourceMixin
 from src.data_collection.metar_sources import MetarSourceMixin
 from src.data_collection.mgm_sources import MgmSourceMixin
+from src.data_collection.jma_amedas_sources import JmaAmedasSourceMixin
 from src.data_collection.nmc_sources import NmcSourceMixin
 from src.data_collection.nws_open_meteo_sources import NwsOpenMeteoSourceMixin
 
 
-class WeatherDataCollector(OpenMeteoCacheMixin, SettlementSourceMixin, MetarSourceMixin, MgmSourceMixin, NmcSourceMixin, NwsOpenMeteoSourceMixin):
+class WeatherDataCollector(OpenMeteoCacheMixin, SettlementSourceMixin, MetarSourceMixin, MgmSourceMixin, JmaAmedasSourceMixin, NmcSourceMixin, NwsOpenMeteoSourceMixin):
     """
     Multi-source weather data collector
 
@@ -167,6 +168,11 @@ class WeatherDataCollector(OpenMeteoCacheMixin, SettlementSourceMixin, MetarSour
         )
         self._nmc_cache: Dict[str, Dict] = {}
         self._nmc_cache_lock = threading.Lock()
+        self.jma_cache_ttl_sec = int(
+            os.getenv("JMA_AMEDAS_CACHE_TTL_SEC", "300")
+        )
+        self._jma_cache: Dict[str, Dict] = {}
+        self._jma_cache_lock = threading.Lock()
         self.settlement_cache_ttl_sec = int(
             os.getenv("SETTLEMENT_SOURCE_CACHE_TTL_SEC", "120")
         )
@@ -756,6 +762,21 @@ class WeatherDataCollector(OpenMeteoCacheMixin, SettlementSourceMixin, MetarSour
             results["mgm_nearby"] = official_rows
         results["nearby_source"] = "nmc"
 
+    def _attach_japan_official_nearby(
+        self, results: Dict, city_lower: str, use_fahrenheit: bool
+    ) -> None:
+        if city_lower != "tokyo":
+            return
+        official_rows = self.fetch_jma_amedas_official_nearby(
+            city_lower, use_fahrenheit=use_fahrenheit
+        )
+        if not official_rows:
+            return
+        results["jma_official_nearby"] = official_rows
+        if "mgm_nearby" not in results:
+            results["mgm_nearby"] = official_rows
+        results["nearby_source"] = "jma"
+
     def _attach_warsaw_official_nearby(
         self, results: Dict, use_fahrenheit: bool
     ) -> None:
@@ -851,6 +872,7 @@ class WeatherDataCollector(OpenMeteoCacheMixin, SettlementSourceMixin, MetarSour
 
                 self._attach_turkish_mgm_data(results, city_lower)
                 self._attach_china_official_nearby(results, city_lower, use_fahrenheit)
+                self._attach_japan_official_nearby(results, city_lower, use_fahrenheit)
                 if city_lower == "warsaw":
                     self._attach_warsaw_official_nearby(results, use_fahrenheit)
                 self._attach_global_nearby_cluster(
@@ -878,6 +900,7 @@ class WeatherDataCollector(OpenMeteoCacheMixin, SettlementSourceMixin, MetarSour
 
                 self._attach_turkish_mgm_data(results, city_lower)
                 self._attach_china_official_nearby(results, city_lower, use_fahrenheit)
+                self._attach_japan_official_nearby(results, city_lower, use_fahrenheit)
                 if city_lower == "warsaw":
                     self._attach_warsaw_official_nearby(results, use_fahrenheit)
                 self._attach_global_nearby_cluster(